Loop 1604

Loop 1604
Name	Loop 1604
Type	Highway
Route	1604
Length mi	95
State	Texas
Maint	Texas Department of Transportation

Loop 1604 is a major orbital highway encircling the city of San Antonio, Bexar County, and portions of Comal County, Gonzales County, and Medina County in Texas. The route functions as an arterial ring connecting Interstate 10, Interstate 35, Interstate 37, U.S. Route 90, and multiple state highways while serving suburbs such as Schertz, Selma, Universal City, Leon Valley, and Alamo Heights. It intersects key regional assets including San Antonio International Airport, Port San Antonio, SeaWorld San Antonio, and the Randolph Air Force Base area, integrating with corridors used by Toyota Motor Corporation suppliers, Valero Energy Corporation, and USAA facilities.

Route description

The highway begins near the junction with Interstate 10 and runs as a controlled-access freeway past Stone Oak, The Dominion, and Windcrest before curving east toward Cibolo, Schertz, and Seguin. Along its alignment it crosses major corridors such as U.S. Route 281, U.S. Route 90 Alternate, and State Highway 151, providing access to employment centers including Brooks City-Base, South Texas Medical Center, and retail nodes anchored by The Shops at La Cantera, Alamo Quarry Market, and North Star Mall. The roadway transitions between urban freeway segments near Downtown San Antonio and rural divided highway stretches abutting Medina Lake, Cibolo Nature Center, and agricultural tracts historically associated with Tejano ranching families. Interchanges link to commuter routes toward New Braunfels, Boerne, and Kerrville, connecting regional transit plans involving VIA Metropolitan Transit, Alamo Regional Mobility Authority, and statewide initiatives led by Texas Department of Transportation.

History

The corridor was first conceptualized amid mid-20th-century growth following expansions tied to Kelly Air Force Base closures and the rise of defense contractors such as Lockheed Martin and Boeing. Early planning involved coordination among Bexar County Commissioners Court, the Alamo Area Metropolitan Planning Organization, and elected officials including members of the Texas Legislature representing San Antonio. Initial segments were built to relieve congestion along U.S. Route 281 and to provide redundancy for Interstate 10 after disruptions linked to severe weather events that affected freight movements to Port San Antonio and Port of Houston. Community advocacy from civic groups such as the San Antonio Chamber of Commerce and preservationists tied to Historic San Antonio shaped alignment decisions near neighborhoods like King William and Monte Vista.

Construction and improvements

Construction phases were executed under contracts awarded to regional firms with ties to Fluor Corporation, Austin Commercial, and local contractors. Major improvement projects included conversion of two-lane segments to four- and six-lane divided highways, reconstruction of interchanges at Interstate 35 and US 281, and implementation of auxiliary lanes near Randolph Air Force Base and San Antonio International Airport. Roadway enhancements incorporated federal funding mechanisms through the Federal Highway Administration and state bonds authorized by the Texas Transportation Commission. Design standards referenced guidelines from American Association of State Highway and Transportation Officials and environmental reviews coordinated with the Texas Commission on Environmental Quality due to proximity to San Antonio River tributaries.

Traffic and tolling

Traffic volumes on the ring vary widely, with peak congestion observable on segments near Interstate 35 and U.S. Route 281 where commuters travel between employment centers like Medical Center hospitals and suburban developments in Schertz and Cibolo. Freight movements link to intermodal facilities servicing companies such as BNSF Railway and Union Pacific Railroad, influencing peak truck percentages measured by TxDOT traffic counts. Tolling has been proposed and partially implemented on adjacent corridors managed by the Alamo Regional Mobility Authority and the Texas Department of Transportation through electronic tolling systems similar to TxTag and interoperable networks like EZ TAG in the Houston region, though the mainline currently operates primarily as a non-tolled state highway with targeted tolled express lanes studied for congestion management.

Exit list

The loop includes numerous interchanges with federal and state routes, including major junctions at Interstate 10 (two locations), Interstate 35 (north and east quadrants), Interstate 37 via connector routes, U.S. Route 90, U.S. Route 281, and State Highway 151. Local exits serve communities and landmarks such as Pat Booker Road, FM 3009, Loop 410 (via connecting ramps), Bulverde Road, and access roads for SeaWorld San Antonio and Six Flags Fiesta Texas adjacent entertainment districts. Exit numbering and signage conform to standards adopted statewide by the Texas Department of Transportation and are maintained to support navigation for logistics companies including FedEx and UPS.

Future plans and proposals

Long-range plans under the Alamo Area Metropolitan Planning Organization and TxDOT envision widening projects, managed toll lane corridors, interchange reconstructions, and multimodal integration with VIA Metropolitan Transit bus rapid transit concepts and park-and-ride facilities tied to Commuter rail feasibility studies connecting San Antonio with New Braunfels and Austin. Proposed projects consider environmental mitigation in coordination with U.S. Fish and Wildlife Service and regional water supply entities such as the San Antonio Water System. Funding strategies reference federal infrastructure programs championed by representatives to the United States Congress and potential public-private partnerships involving infrastructure investors and regional authorities.

Category:Roads in San Antonio Category:Transportation in Bexar County, Texas